Universal tone-arm.



P. BEGKER.

uNwERsALToNeARM.

APPLICATION FILBDJAN. 23, 1917.

Patent-ed Apr.,24,1917.

wilma-ses v fade/@MMM PETER BECKER, OF NEW YORK, N. Y.

UNIVERSAL TONE-ARM.

To all wwm z't may concern.'

Be it known that I, PETER BECKER, a subject of the German Emperor, and aresident of the city of New York, borough of Manhattan, in the countyand State of New York, have invented a new and Improved UniversalTone-Arm, of which the following is a full, clear, and exactdescription.

This invention relates to phonograph tone arms of that type whichadjustably supports the reproducer so that the phonograph can 'playhill-and-dale and lateral cut records. A

zie

The invention hasvrfor its general objects to improve the constructionand operation of devices of this character so that the needle willtravel approximately in the same line on either type of record, wherebya better reproduction of sounds will be obtained .and there will be lesswear and tear on the sound grooves.

A more specific object of the invention is the provision of a novel formof joint between the gooseneck of the tone arm and the reproducer,whereby the latter can be easily and quickly adjusted to its differentpositions.

With such objects in view, and others which will appear as thedescription proceeds, the invention comprises various novel features ofconstruction and arrangement of parts which will beset forth withparticularity in the following description and claims appended hereto.

In the accompanying drawing, which illustrates one embodiment of theinvention and wherein similar characters of reference indicatecorresponding parts'in all the views,

Figure 1 is a side view of a tone arm with the reproducer adjusted forplaying lateral cut records;

Fig. 2 is a similar view showing the reproducer adjusted for playinghill-and-dale l cut records;

Fig. 3 is an enlarged sectional view of the goose-neck and joint betweenthe same and reproducer l Fig. 4 is a perspective view with thereproducer detached; and

Fig. 5 is a perspective view of the reproducer-carrying elbow and thesection of the joint attached thereto.

Referring to the drawing, 1 designates a reproducer, 2 a tone arm, 3 thegooseneck, 4 the elbow carrying the reproducer, and 5 the slip jointbetween the gooseneck and reprorincer-carrying elbow.

Specification of Letters Patent. Pani-n ted Apr. 24, 1917, Applicationled January 23, 1917. Serial No. 143,939.

The joint 5 is made up of a plurality of sleeve sections 6, 7 and 8`ofsuccessively smaller diameter to telescopically fit one within theother. The largest sleeve 6 slides 1n the straight outer member 9 of thegooseneck 3, and it is confined to a longitudinal movement by means ofpins 10 engaging in longitudinal slots 11 in the outer surface of thesection 6, said pins being threaded in the wall of the member 9 of thegooseneck. The section 7 is confined to a longitudinal movement by meansvof a screw pin I2 threaded in the wall o f the section 6 and engagingin a longitudinal slot 13 in the section 7 The innermost section 8,which is rigidly fastened to the elbow- Ll, has a combined longitudinaland rotary motion. For this purpose the section 8 has an L-shaped slot14 into which engages a screw pin 15 threaded in the section 7. Oneextremity of the slot 14 has a recess or offset 16, whereby alongitudinal. pull after the reproducer has been turned, will lock thereproducer in the position shown in Fig. 1, so that the diaphragm of thereproducer will be parallel with the axis of the tone arm 2. Vhen thejoint 5 is contracted, as shown in Fig. 2, the reproducer is preventedfrom turning around the member 9 as an axis, because all the stop pins10, 12 and l5 will prevent this.

scoping sections of the joint 5 from choking the gooseneck, the innerends of the sections 6, 7 and 8 have recesses 17 cut therein, whichrecesses all register when the joint 5 is contracted, as indicated bythe dotted line 18, Fig. 3.

From the foregoing description taken in connection with the accompanyingdrawing, the advantages of the construction and method of operation willbe readily understood by those skilled in the art to which the inventionappertains, and while I have described the principle of operation,together with the device which I now consider to be the best embodimentthereof, I desire to have it rnderstood that the device shown is merelyillustrative and that such changes may be made when desired as fallwithin the scope of the appended claims.

Having thus described my invention, I

claim as new and desire to secure by Let ters Patent: I i

L A. universal tone .arm comprising' gooseneo'k, a repi'oiiucenoarryingelbow, ansi a telesooping joint between the elbow an@ gooseneolz, saidjoint comprising three loze gitndinally slid able sections tting oneWithj in another, the outermost section being slid@ able in thegooseneok and the innermostseo tion being rigidly connected with theelbow; means for limiting the outer and inteintiefi--v ate section to alongitudinal movement, ami means for limiting the inner section to' I,longitudinal and rotaiy movement.

2. A universal 'tone arto comprising a, gooseneok, a reproducer-cairymgelbow, and

a telesooping joint betweenmthe' elbow andiv gooseneck, said jointcompiising tbieo ionu gitudinally yslidable sections fitting1 one withinanother1 the outermost section being sidalolev in the gooseneok and theinnermost'.

section being rigidly' eonneote vivitlr the elbow, means for limitingtheouter and intermediate section to a'longitudinal "movement,

ineens? ami means for iimiting the inner sent-ion to longitudinal androtary movement, the inner ends of the said sections being provided withrecesses adapted to registei when the said joint is contracted.

.3. A universal tone arm including a gooseneok, a reproduoe1-carryingelbow, 'and an extensible joint between the elbow and goosenook, saidjoint consisting of a plurality of tubular sections fitting one withinanother, thev outermost section being slidable lin the gooseneok, and.the innermost being rigidly oonneoteol with the elbow, means forlimiting all of the sections except the innermost one to a longituflinal,movement and for limiting the extent of the longitudinal movement, andmeans between the innermost section ano, the nextor pei-mitting the'innermost section to move longitudinally and rotatably and againlongitudinally.

PETER BECKER.

